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reciprocal

From Wiktionary, the free dictionary

English

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Etymology

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FromLatinreciprocus, possibly from a phrase such asreque proque(back and forth,to and fro), fromre-(back),prō(forwards) and-que(and).

Pronunciation

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Adjective

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reciprocal (notcomparable)

  1. Of afeeling,action or such:mutual,uniformly felt or done by each party towards the other or others;two-way.
    Synonym:reciprocating
    reciprocal love
    reciprocal duties
  2. Mutually interchangeable.
    • 1725, Isaac Watts,Logick: Or, The Right Use of Reason in the Enquiry after Truth, [], 2nd edition, London: [] John Clark and Richard Hett, [], Emanuel Matthews, [], and Richard Ford, [], published1726,→OCLC:
      These two rules will render a definitionreciprocal with the thing defined.
  3. (grammar) Expressing mutual action, applied to pronouns and verbs; also in a broad sense:reflexive.
  4. (mathematics)Used to denote different kinds of mutual relation; often with reference to the substitution of reciprocals for given quantities.
  5. Done, given, felt, or owedin return.
    areciprocal invitation to lunch

Synonyms

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Derived terms

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Related terms

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Translations

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done by each of two people towards the other
grammar: expressing mutual action, applied to pronouns and verbs
done, given, felt, or owed in return
The translations below need to be checked and inserted above into the appropriate translation tables. See instructions atWiktionary:Entry layout § Translations.
Translations to be checked

Noun

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reciprocal (pluralreciprocals)

  1. (arithmetic) The number obtained by dividing 1 by another given number; the result ofexchanging thenumerator and thedenominator of afraction.
    Synonym:multiplicative inverse
    0.5 is thereciprocal of 2.
  2. (grammar) A construction expressing mutual action.
    • 2008, Ekkehard König, Volker Gast,Reciprocals and Reflexives: Theoretical and Typological Explorations:
      Depending on where reciprocalization applies (syntax vs. lexicon), the relevant reciprocal verbs are claimed to exhibit specific properties, in particular: (i) syntacticreciprocals are fully productive whereas lexicalreciprocals have only limited productivity;[]

Translations

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in mathematics
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